Abstract
Surface-treated microfine cements were prepared as a grouting material for use in a cement powder grouting method. This method is used in dam foundations that are hardly permeable to cement slurry. Laboratory test results revealed that decrease in the amount of size fractions coarser than 10μm and finer than 1μm in surface-treated cements remarkably improves the permeability of sand specimens. By using the cement powder grouting method with such a cement, a remarkable improvement in the water tightness of dam foundations with minute pores that are hardly permeabe to cement slurry can be achieved.
